spiral to spiral

acceptable quality level (aql) Ajo process (for copper extraction) backward option BAPC Ein Zorene erysiphe orontii focimete incentive mechanism interstellar absorption line Kaministikwia methium nonsuperfluous plate-detection type vacuum tube voltmeter posterior mesenteric plexus Proletarskaya proteinphobia series-resonant circuit side tip car since when...? thin route circuit